/**
 * #      1078
 * 名称   Bigram 分词
 * 链接   https://leetcode-cn.com/problems/occurrences-after-bigram
 * 题解   [147](https://leetcode-cn.com/problems/occurrences-after-bigram/solution)
 * 通过率 62.5%
 * 难道   简单
 */

